Machine fob filing saws



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/f IMM@ 6/1/ M/f/ y N.,PETERS. PHOTC-LITHQGRAIJIIER WASHINGTON D P A.HADLEY, OF LYNN, MASSACHUSETTS.

MACHINE ron FILING-smits.

Specification of Letters Patent No. 24,118, dated May 24, 1859.

To all whom 'itv may concern: v

Be it known that I, A. I-IADLEY, of Lynn, in the Commonwealth ofMassachusetts, have invented an Improved Machine for Filing Straight andCircular Saws; and I do hereby declare that the following is a full andexact description thereof, reference being had to they accompanyingdrawings, and to the letters of reference marked thereon.

To enable others skilled in the art to which my invention belongs tomake andy use the same, I will proceed to describe its construction andoperation.

Figure 1, of the drawings represents a perspective view of the machinewhen used for ling straight saws; Fig. 2, represents a perspective viewof a circular saw mounted on a shaft. v

a, represents a straight saw which is clamped between `a plate d, and arail e, by means of a set screw o, which screws through the end of anarm b, extending from the rail. The rail slides in grooves f, f, inframe g; the bottom of the frame has a slot through which the pawl no,works in combination with ratchet teeth in the under surface of therail. A piece i", i, j, z', is made with two arms 71', 71', which arepivoted to the frame g at la, h, only one of these pivots being visiblein the drawings. Two rods f', f are pivoted to staples extending fromthe under surface of the railframe g, at g, g.

The whole combination of parts above described a d o e o g c' 2" j" ff,can be removed from the machine or may be attached to it in thefollowing manner. The lower ends of the rods f, f', are passed intoholes made through sleeves i', and table o', and the pivot z', is passedinto ring lo, until the rim j", rests against the upper surface of ringle, and the pawl oo, isin contact with the ratchet teeth in the bottomof the rail e. The rail and railframe can now be moved on pivotslz., 7L,the rods f,.], playing freely through the sleeves z", c, and table o.When the rail and railframe have been set at the desired inclination,they can be conlined in their position by screwing up the set screws h,it', until their ends bear firmly againstvthe rods j, f, in the sleeves.The ring k, is permanently fastened to the table o, by two supports y',y'. The pawl w, is pivoted to the upper end of an arm fw, and is heldand pressed upward by a spring y,vriv eted to arm w. The lower end ofthe arm w, is formed into a hub which is fastened to a shaft s, by meansof a set screw` (not shown in the drawings). l

The shaft s (part of which is represented in the drawings as brokenaway) has itsV bearings in standards o, lv, the rear end lof the shaftcarrying a crank t, anda connecting rod u, being pivoted to the lowerend of the crank, while the other end of the connecting rod u, isjointed to a staple d', which extends from the rear end of stirrup e.

The central part of this stirrup has a hole loosely fitting the shaft ofa horizontal ratchet wheel t, and a collar o, slotted at a, is fastenedto the shaft of theA ratchet wheel above the stirrup, by means of a setscrew (not shown inthe drawings). wThe top of the ratchet wheel shaft ispointed as seen at Z, andy thel center line of the sha-ft is in linewith the center of ring la. A pawl 7c', is pivoted tot-he---table-\o--,'and `is held against the teeth of the ratchet wheelby a spring Z. Another pawl j', pivoted to the front part of/the stirrupis also made to engage with the teeth of the ratchet wheel by means of aspring m.

The front endof ythe stirrup can be lengthened .or shortened 4by movingthe slotted piece n', in or out and then confining itby the set screwpassing through the slot.

The play ofthe rear end of the stirrup is regulated Aloy a screw az,which screws through astaple o, fastened to table o", the staple d,bearing against the end of the screwv ae, in consequence of the tendencyof a spiral spring o', fastened at both ends to the staples d', and o.'By screwing the screw az, in or out more or less play may be given therear end of the stirrup.

The table o', has slots p, in its sides which lit over tonguesg,projecting from the horizontal portion r', of the main lframe of themachine, soV that the table o, may be moved in or out upon saidtongues.v Y- l The upright portion s', s', of the main frame is madewith arches 27,15', forming parts of one circle, the arches beinggrooved on their inner sides as seen at m. `Y

The block frame o', is rounded at the top and bottom at a', u, so as tofit'the circle of the arches, and has projections which corre* vspondwith the grooves oo, inthe arches.y

screwin into the arches t', t', `(only one plate a and screw s beingshownin thedrawings) It will be seenfrom" the above that' vtheA blockframe fv, can play in the grooves and can be moved YVaround itsf center,`an

can be confined in any position by means' t jectngfromltbeblock,andtheother^en of the lever c, is connected tof a crank g","bymeans of a rod f, and knuckle joint e. The crank g, is keyed to thej endofdriving shaft 11,, which has its bearings in staples fw, w, fastenedto `frame s-, sf; thershaft may beldrven either bymeans of a handlevattached toA flywheel Z, `or iniany other suitable manner. A bevelpinion i, uponjshaft h, takes into a bevel wheel 7', which is providedwith a pink, projecting downward fromV a point' near itsvperiphery.

When the tableA 0, has been movedfor.-V ward on the tongues gf, as faras it will go, the clin-Ja, will strike the end n', ofthe t st-irrup e',once during one revolutionv of the bevel Wheel j, moving this endof thestirrup sidewise, more or less according to the adjustment ofthepiece;nv. "Of course the farther the piece-fro', ismadeto projectthelonger will the pin Ic, bexincontact with it and the greater will be.the Vsweep p imparted to the end of the stirrup.

Two long screws z, z, screw through a block y',their ends supporting andturning in a bracket m. j j

Platesare fastenedV to the .top andi bottom of the bracket which serve'vas bearinofs for a shortvertical shaft nQto' which aufile g, is.fastened by means of clamps" and set screws 1*,02 A slottedY wing p,extending. from the top part of shaft n", in combinationrwith a setscrew screwing-into the top of the bracket m,nserves to turn thefile-around the axis ofthe shaft n, soas to give the Vsides ofthe sawteeth more or less inclination'. on l v y When 1t; is deslredto `filecircular saws,

' l l Il @he parts a: bs 0 da evrgavf 7 f rz 7 .7,5

z, are removed, and the Vshaft z3', (lipon L which the circular saw y,is mounted as seenV in Fig` 2,) is inserted between the points m, and Z,and the screw m, is turned down until it enters-the little cavity in theend of the shaft z-,"the" point-s m, and Z,

will then serve as pivots. for the shaft z.

The screw m, passes through a block Vin, whlch' can be moved ina slotinthe piece 20,

frame is providedl by means of adjusting screw o.` The piece` p, extendsfrom the upper end of a curved rod g, the lower end of which is firmlyscrewed. into a standard r, fastened to table o. By moving the block n,1n the slot tlieinclination of the shaft z, and

consequently the inclination or bevel of the teeth oflthercircularsawcan be determined.

AA' clampA a, is fastened to the lower end of mined by either adjusting;the circular `saw shaft' by means fof block n, andv screw 0,or bysetting the saw plate a, atthe necessary inclination-by means of rodsj', f', and set i screws 7L", 7L. By adjusting: the block frame o',iniits` circular ways wrrso as toincline the fileA g, front the verticalline, the bevel of the saw teeth can be increased beyond. the limits ofthe adjustment obtained by means of block u, and screw o, or rods f', f,and set screwsh,` h. angle between the/surface of the sawplate `an, ory, andi the* centerline of le gfytol `wtjthe vbevel of the saw"teethcanbewdetenmined.

The file g5', is then moved toward the Sawplate,by means of the screwsz,.z,untillthe edge of the file' engages'with the edge of the saw plate.j Beforeycommencing theiopera- Thusit wiu be seenthe tion of filingtheateeth5 the fles alsoto be l i adjusted around the axis of Shaftn,sby means of theiset screwandwingspso. as to cause the teeth to'befiled more or less pointed. Now when the driving shaft is set in motionthecrankl g, will actuate the' lever o, soV as to impart a verticalreciprocating motion tothe block fy, and to theiile;` g,I connected toythe block, l so r as to cause the le to make incisions: into theedge ofthe saw plate. After the whole lengthof thestraight or the wholecircumference `of the circular saw, .has been thus liled, the le maybead'- vanced a little by means of the screwsaa, i so as to cut the teethdeeper, and so forth; As often as the block yf, arrives toward. the endof its'upward motion, the friction rollers w', enter the curvedyportions y", of` the grooves w', so as to cause the block:- yf; andfile g, to move back from .the edge of the saw plate; Simultaneouslywith thisdisen of the spiral spring c. This motion of the stirrup causesthe pawls y, lo', to move the ratchet wheel t, the distance of oneor-more of its teeth, and operates also the device cZ, u, 15, s, fw, soas to cause the pawl to move the rail e, the distance of one or more ofthe ratchet teeth in the bottom of the rail, and thus move the saw platea, a distance of one saw tooth. But if the circular plate y, is in themachine instead of the straight plate a, the motion of the ratchet wheelt, causes the shaft a, to turn with it so as to turn the saw plate 1 thedistance of one saw tooth. During the time t-he saw plate is thusadvanced, the block y, and the file commence their downward motion, andby the time the pin 7c, slips off the end n, of the stirrup, thefriction rollers m, leave the grooves y", and the file engages againwith the edge of the saw plate and cuts the next tooth.

Having described my improved machine for filing straight and circularsaws, what-I claim therein as new and desire to secure by LettersPatent, is:

l. Determining the bevel of the teeth of a straight saw by means ofpivoting the frame g, (which supports the rail e, and saw plate a,) atit, and hinging rods f', f', to said frame g, as seen at g', g', andconfining these rods in their relative position by set screws it, it',constructed and arranged substantially as above described.

2. Determining the bevel of the teeth of a 4. Holding the file by clamps1', r, set i screws o, 0, in combination with shaft n, set screw p, andbracket m, constructed and operating substantially in the manner and forthe purpose set forth.

5. The combination of the movable table 0, with the mechanism forsupporting and moving the saws, constructed and arranged thereon asshown and described, whereby the same machine can be quickly adapted forfiling either straight or circular saws as set forth. Y

6. The combination of the mechanism for supporting and moving the saws,with the mechanism for supporting and operating the le-constructed,arranged and combined as above described and for` the purposes setforth.

A. HADLEY. Witnesses:

A. J. ROBINSON, J. C. FRENCH.

